Misthreading device for weft-replenishing looms.



l. NORTHROP.

MISTHREADING DEVICE FOR WFFT REPLENISHING LOOMS. APPLICATION FIEDAPR.`5, i915A 4 SHEETsv--snasr x.

l. NORTHROP.

MISTHREADING DEVICE FOR wEFT REPLENHLHING Looms.

APPLICATION FILED APR. 5 l9l5.

J. NORTHROP. MISTHREADING DEVICE FOR wEFT REPLENlsHlNG Looms.

APPLICATION FILED APR. 5. 1915.

1 ,1 86,932 Patented June 13, 19l6.

4 SHEETS-SHEET 4.

. /Vormo/ O e/"Of/ on.

7 ai 3637/38 30 /O 3&9 O r 3 Pos/f/Of 1:5

JONAS NORTHROP,

CHUSETTS.

OF HOPEDALE, MASSAC FACTURING COMPANY, OF MILFORD, MA

ASSIGNOR TO HOPEDQLCE MA MISTHREADING DEVICE FOR WEFT-REPL'EN'ISHING'LOOMS- Application filed April 5, 1915.

To (1U Hwjm it muy concern:

le it known that I, JONAS Non'rnnor, a citizen ot' the United States.residingr at Hopedale, in the county of \Vorcester and State ofMassachusetts, have 'invented certain new and useful lmprovements inMisthreadiner Devices for VVet't-Replenishing Booms; and l do herebydeclare the following' to be a full7 clear. and exact description of theinvention. such as will enable others skilled in the art to which itappertains to lnake and use the same.

The present invention relates to an improvement in misthreading devicesVfor weft replenishing looms.

'hen the filling of a newly inserted bobbin in a weft replenishing loombreaks during weft replenishingr operation` the breakage is called ahopper misthread.

()ne object ot' the invention is to produce a construction which willstop the loom upon the occurrence of three successive hopper misthreads.

when the fillingr fails to enter the sluittlc eye during the weftreplenishing operation a real niisthread results.

Another object of the invention is to pro duce a construction which willstop the loom upon the m'currence of one real misthread.

ln furtherance of these objects the chief object of the invention is toproduce a misthreadingY device ot great simplicity and certainty ot'operation. and to this end the invention consists in the constructionhereinafter described and particularly pointed out in the claims.

ln the accompanying drawings illustrating the preferred form of theinvention, Figure l is a side elevation of the lett-hand end ot' theloom showing the attachment of the improved inisthreading devicethereto; Fig. 2 is a plan of the parts shown in Fig. l; Fig. 3 is apartial front elevation of the parts shown in Fig. l; Fig. 4 is apartial side elevation showing the mis threading device in the positionfor cruising.; loom stoppage; Fig. 5 illustrates the va rious positionsot' the misthreading device. during three successive hopper niisthreadsfollowing the operation of the weft replenishing mechanism; Fig. (lillustrates the operation otl the -lnistlireading device duringSpecification of Letters Patent.

Patented June i3. 1i? t3.

Serial No. 19,208.

one real niisthread: and i the operation of the inisthreadinpj whenthere is neither a real nor mistliread after an indication of hij senceand the insertion otl a fresh snr-,nti et Fig. i ii usrfilling'.

'l`he loom to which the inipmm threadingT device, is attached. an .ifthe leftfhand end is .shown in the n embodiment o' the invi'ntion` may'be f usual or preferred torni. The loon: shown comprise a breast beani Wshipper slot ll provided with a in which received the shipper ll therunning otl the loom. knockptlf l. 14 is pivotallv supported on alirarifct cured to the breast beam and engage i sh'lDDtl' ll. Theknock-olf lever lr-'l vided with a do.vnwardl v projectii't hifi whichengages the front of the mcs beam thereb)v limiting;A the rearward move!ist et the knock-oill lever. )i tillinnj detecter or wett Jfork l5 ispivotally supported on the 'fr slide lo which reciprocates torna-milj;and backwardlv in the slide supporting.r lnaeket li which is secured tothe breast wein lil, The forward end of the slide lo is provi with aboss lo which engr-.ries the, n) end of the detector arm it! mountediig/1n the rock shaft 2() which extends acr fno front of the loom and iseonina'te. at l' other end of the'loom with plenishing mechanism.

.21 reciprocates foiwvardl)v and haft: under the detector Jfork. andvvhen of the detector fork is depressed upon absence. the weft hannnerengages the, 2;). depending from the tail ot' the ff j pushes the slide1G forward.y thereby lonf theI rock shaft 2U through the niedlinn ot thedetector arm lt? to set in sperati weft replenisliing mechanism. when isa fillingr presence on a detecting detector fork is tilted. and then thetom reciproeation of the, weft bannner l connnuuicated to the slide.Vthe described parts constitute the iiiling di," ing means and thelilling snppliV opcraiinpr means. which operate in the usual manner uponthe absence of tilling on a. detecting beat to cause the insertion ot'ay .fresh snpg'ily of filling in the shuttle.

the iili. The weft ha .1

The misihreading device is a contrivance for causing the stoppage of theloom upon the occurrence of three successive hop er inisthrcads or onereal inisthread following the operation of the filling supplymechaiiism. This contrivance com )rises a knockoii' lever actuator 25actuate by the filling supply operating means; `a stop-delaying deviceor tumble block 26 connected to the knock-olf lever actuator andsupported by the upright 27 of a bracket secured to the breast beam 10;and a resctter 28 of which the function is to reset the sto -delayingdevice or tumble block 26 and a so, under certain conditions of loomoperation, to accelerate the movement of the stop-delaying device. Theknock-oil lever actuator 25 is pivotally connected to the detector armat.

29 and is provided on its rearward end with a lateral projection or lug30. When the stop-delaying device or tumble block 26 is in the positionshown in Fig. 4, the knockoil leve;` actuator 25 is lowered so that thelng 30 is dropped behind the knock-oil' 1ever 1l. When the lever 25 isin this position and there is filling absence upon a detecting beat theforward movement of the detector arm 19 causes the knock-olf lover 1l todisengage the shipper 13 from the re cess 12, thereby knocking oil` orstopping the loom.

The stopdelaying deviceor tumble block is general y rectangular in formand is ecceiitrically pivoted. to the knoclaoff lever actuator 25 at 32.On each forward move` nient of the detector slide 16, owing to theengagement of the weft hammer 21 with the hook 22 of the detector fork15, the tumble block 2G is caused to travel forwardly along the uppersurface of the upright 27. 1f a filling absence occurs during the normaloperation of the loom, the corner 33 of the block 26 will come intovnmigenient with the shoulder 36 on the upright 2T and as the blockcontinues its forward movement it will be turned on its axis and broughtinto the position shown in position 1 in Figs. 5, (i and i'. Thisposition is always amuiiied b v the tumble block upon the occurrence ofa filling` absence after a normal operation of the loom. lf twosuccessive hopper inisthreads follow this lilling absence. the slide 16will be moved forward twice successively and the corners il and 35i ofthe tumble block 26 will be siwressii'el brought into engagement withthe shoulder 36, thereby causing tin` bloeitv to be tnrneil on its axis:mil liioiigtlit into llii position showin in Fig. l. lf now tliei'iL isa third successive bop per misthrcad following the filling absence. thelilorli :6 will be aimed, forwardly in the usual manner. l` itilioworner Si? (which. it will he notid. if: provided ith a curved sui"faro). instead of engaging thc shoulder 3G a ill rido np over it andwill not be turned 'served that on each forward movement of the block 26due to the succeive hopper misthreadstlie block is turned through anangle of approximately 90. A rotative movement is also imparted to theblock 26 when there is a filling; presence following an operation of thewe;u supply mechanism. This rotative movement is communicated to theblock 26 by the resetter 28 which is act-here is a filling presence. Toeffect this latter rotative movement the, block 26 is provided With alaterally extending projection or lug 38 which is adapted to be engagedby the resetter 28. The resetter 28 reciprocates forwardly andbackwardly u on the top surface of the forward end of e slide 16 and ismaintained in o erative position thereon by the ears 40 w'liich prometup Wardly from the slide and engage the sides of the tail 41 irojectinrearwardly from the icsetter. T e tail 4f of the resetter 28 is providedwith a hook 42 projecting downwardly into the path of the motion of theweft hammer 21. Whenever-.there is a lilling presence, and, as s resultthereof, the detector fork 15 is tilted out of the path of motion of thewett hammer 21, the hook 42 is engaged by the weft hammer and theresctter 28 is moved forward to the osition shown` in position 3 of Fig. 6. he forward movement of the resetter 28 is limited by theengagement of the hook l2 with the slide 16, and the rearward movementof the resettcr 2S is limited b v the'engagement of the shoulder 43 ofthe resetter against one of the ears l()` T he tail l1 of the rcsetter2b is prevented from upward movement by the Cotter iin l5 which passesthrough the cars 40. he forward end of the resetter is prevented fromupward movement by the engagement of the foot 46 with the under surfaceof the shelf -l which projects lat eially from the upright 27.

Attention is diwctwl to the position of the lug de with respect to thesliding Surftoes of the block 26, Attention is also directed ro thedistances between these surfaces and the axis of the block. When theblock is in the position shown in Fig. 4 the knoelb olf lever actuator25 lowered S0 that tho lag l0 will engage the knocked lever 14 upon theforward movement of the slide "im Vtuated by the weft hammer 21 wheneverISI) When the block 26 is in any position other than the position shownin Fig. 4, the knockoif levei` actuator 25 will be raised; so that thelug 30 will clear the lcnock-offulever on a forward movement of theslide 16. 1f now the block 2G is in the position shown in Fig. l, itindicates that the loom is running normally and there is fillingpresence. Consequently the weft hammer 21 on its forward beat engagt;the hook 42 of the resetter 28 and pushes it forward It will be-observed that when the block 2G is in this position, the lug 38, whichis situated close yto the normal operation surface of Athe block,occupies a low position relatively to the resetter 2S so that as theresetter moves forward the lug 38 is received in the recess 48 of theresetter, as isshown in position 5 of Fig. 7. Consequently the resetterhas no operative effect upon the stop-delaying device 2G during thenormal operation of the loom.

The lresetter 2S performs a double function, to wit: First, when thereis a filling absence and the tumble block 26 occupies the position shownin position 1 of Figs. 5, 6 and 7, and there is a filling presence onthe detecting beat following the filling absence, the resetter 28, onits forward movement, engages the lugSS and causes the tumble block 2Gto be turned through an angle 0f 1800, that is, to the position shown inposition 4 of Figs. 6 and 7. lnrotating the block 2G through the angleof 180O the resetter accelerates its movement, which is normally throughan angle of only 900, as was described in connection with the operationof the block 2G during successive hopper n'iisthieads following afilling absence. Second, when the block 2G is in the position shown inFig. 4, the resetter 2S on its foi'- ward movement. during fillingpresence will .engage the lug 38 and cause it to be turned through anangle of 90 to the position shown in Fig. 1, therebyl resetting theblock 26 to the position indicating normal operation of the loom. 1t isto be noted, of course, that whenever the weft hammer 21 pushes theresetter forward, 'the tumble block 26 is not itciprocated, as a resultof which the resetter 28 may act upon the lug 38.. During theaccelerating operation the surface 52 of a cam projection, indicatedgenerally by the reference character 50, on the resetter 28, engages thefiat surface of t'ne lug 38.A Vvhen the resetter 28 operates to resetthe stop-delaying device or tumble block 2G to its normal position, thepoint of the Cani projection 50 engages the lug and thereafter the canisurface 5l coml pletes the resetting operation; so that, if.

may be Said that the earn projection 50 of the resetter 28,- is providedwith an accelerating cam surface 52 and a resetting cani surface 51.

that position 1 indicates the position of the stop-delaying device orblock 2G upon the occurrence of a filling absence during the normaloperation of the loom. Owing to filling absence the detector fork 15 wasnot tilted so that the weft hammer V21 on its forward lbeat engaged thehoolc 22 and moved the slide 1G and the block 26 through the connectingmedia forward and turned the block 2G through an angle of 90"I by theengagement of the corner 33 with the shoulder 3G. On the return beatfollowing the detecting beat the parts assume the position shown inposition 2. A fresh supply of filling having been inserted in theshuttle and the filling having been broken during the insertion thereof,on the next detecting beat the filling absence is indicated, so thatlthe weft hainnier`21 engages the hook 22 and moves the parts foi'-wardly as before. On this forward movenient of the parts the corner 34of the tumble block 2G engages the shoulder 3G so that the block isturned through an angle of 90O and brought into the position shown inposition 3 of Fig. 5; and, on the return beat, the parts occupy theposition shown in position 4. A fresh supply of filling having beeninserted during which the filling was broken, there is filling absenceon the next detecting beat, and the detector fork fails to be tilted, sothat the weft hammer 21 on its forward beat engages the liool( 22 andmoves the parts forward as before. During this forward movement of theparts the corner 35 engages the shoulder 2lb so that the block 2li isturned through an angle of 90 into the position vShown in position 5,Fig. 5. ()n 4the reti'irn beat the parts occupy the position `shown inposition (l. lt will be observed that when the parts are in thisposition the lug 30 is behind the knock-ofi' lever 14.

A third fresh supply of filling having been inserted in the bobbin andthil filling having broken during the filling supply operation, there isfilling absence on the .succeed- V ing detecting beat, so that thedetector fork the knock-off lever to disengage the ship-- per 13 fromthe recess 12, the block 26 continues its forward movement to the posi'tion shown in position 7 before t-lie loom nas come to rest. l/Vhen theloom is started up after stoppage the return beat of the weft hammer 21allows the filling supply operating means to return the misthreadingparts'to the position shown in position 8.

l Referring to Fig. 6, wherein is illustrated the operation of themisthreading device, on the occurrence of aA real misthread, position 1indicates that there has been a filling absence and that the weft hammerhas engaged the hook of the detector fork-and has moved the parts for-\vard. Position 2 shows the position of the parts on the return beat. Afresh supply of filling having been inserted in the shuttle and thefilling remaining intact, there isa filling laid in the shed on thefirst detecting beat ,following the'opera'tion of the filling supplymechanism; consequently the detector fork is tilted. As a result thereofthe weft hammer 21 does not engage the filling fork hook 22, but doesengage the hook 42 of the resetter, pushing the resetter 28 to itsforward position, as shown in position 3. During this forward movementof the resetter the accelerating surface 52 of the cam projection 50 hasengaged the flat surface of the lug 38 so ais-to rotate the block 26sufiicientlyto allow it to assume the position shown in position 4 uponthe return beat, `which is the same as the posi.- tion occupied by theblock in position 6,-of Fig. 5. The filling supply mechanism not havingoperated and vthe thread having broken on the return pick of theshuttle, filling absence will be indicated on the next detecting beat,and consequently the weft hammer will engage the hook 22 and move theparts forward to knock ofl' the loom in the same manner as on theoccurrence of the third successive hopper misthread. The return beat ofthe weft hammer allows the parts to assume the position shown inposition 6, which corresponds to positions 6 and 8 of Fig. 5. i

` Referring to Fig. 7, which illustrates the positions assumed by thevarious parts o-fthe misthreading device during the normal operai-i6110f the loom, position 1 indicatifs.

that there has been a filling absence and that the slide 16 has beenmoved forward to ficttxato the filling supply operatingv means. Position2 shows the position (if, thepartsfoii the return beat. A fresh ply offilling aving been inserted sandte` hopper mist d not having occurred,there willbe presence on thenextdetecting 'beat Consequently,- thedetector fork will-bo tilfednnd the Weft'liammer will engage the 42 ofthe resetter 28 and will move-torward to tho position shown in position3. During this forward move' ment of the rsetter 28 the acceleratingsurface 52 of the cam projection 50 will have engaged the lug 38 andhaverotated the block 26 suticientlyA to allow it to assume the positionshown in position 4 on the return beat of the weft hammer.' Now, a realmisthread not having occurred during the filling supply operation, therewill Vbe filling presence on the second detecting beat and the detectorfork will be tilted. Accordingly, the weft hammer 21 will again engagethe tail 42 of the resetter 28 and move it forward to thc position shownin position 5. ment of the resetter 28, the point of the cam projection50 will have engaged the lug 38 so as to have rotated the block 26through an angle of 90 and have brought it into the position shown inpositior'r, which corresponds to the position shown in Fig. 1, which isthe position'of the block indicating normal operation of the loom. Itwill be noted, as hereinbefore described, that when the block 26 is inthis position the lug 23S-is low relatively to the cam projection 50 Sothat its cam surfaces have no operative effect upon the block, and as aresult thereof, on the st icceive forward bea'ts of the weft hammer andits engagement with the hook Ll2 during filling presence, the resetter28 moves forward inoperatively.

It will be observed, in the foregoing description of the improvedmisthreadingdevice, that upon the indication of filling absence thefilling supply operating means causes the stop-delaying device or tumbleblock 26 to be moved from the position shown in Fig. 1 tor the positionshown in positions l of Figs. 5, 6 and 7, and that, if two successivehopper misthreads succeed this filling absence, the block 26 is operatedby the filling supply operating-means. If, however, there is a realmisthread or n normal operation oi the loom following filling absence,the bock -26 is not actuated Vby the filling supply operating meansbutby the weft hammer 21. It will also be ob- During the forward moveestvServed that there is lining Plen ioia Vsence, the' weft hgnmer, byengagin the resetting device causes the stopelaying device or block-26to be reset 0 normal position. So that the invention not limi ited totheeembodiment hereni'described but be embraced in other forms within.'the of the following daims'f. Having thti's .described gmventioni14 whatIolaim iis c ETA weftjrep lenish` f in: combination; filhngsupp o,A I, lmeans; a filling detector, meansfoiicausing loom stoppage and meansporitvely.connected with and actuated vbythe filling supply operatingmeiins,` on three successive indications of filling absence, to bringthe loom stoppage means into position to stop the loom. 4

2. A weft replenishing loom having, in

combination, filling supply operating means, ,i

lia

r11-aznar :rosativclv connected with the filling zl'lz fcnpiv operatingmeans and adapted t he i merrily upon imlication of filling naviugprovision for actuation "-f weft hammer to restore the loom stopi enfansto normal position if there are sive filling prescnees following areplcnishing loom having. in "mM-on. filling supply operating means,detector, means for causing loom ippagv and a rectangular pivotall'vmountcn sfai-delaying device for controlling the mir-ration of thc loomstoppage means. fi@ o. .lv welt replenishing loom having, in nation,filling supply operating means, detector. a weft hammer, a stop- .fdevil e. and a resetting device havion for accelerating the movementiii-delaying de we and having prof resetting the stop-delaying de lonormai position. i A 'mit replenishing loom having. in "-i ai wn. filing supply operating means, ig fl lector. a wcft hammer, loom stopfemeans. a stopfdelaying device. and a vira-icc. said4 aton-.lelayingdevice infin for the filling actna ion hv growling! means Alfani thelllflcatli lood; l cnre and having provision or miiou in' the resettingdevice on the of filling presence 'following filland l'iaving provisionfor reset rwctting device on a second fillg prc-encc following fillingahsence.

Tfiv ncf't replenishing loom havin", in romhiaal ion. filling supplyoperating means, idling detector. loom stopping means, pivwv iuicel'wmtrolling means therefor i iraclcii and arranged to more longitul rilnn'ativclv if there is filling alifhrce successive detecting heats to irloom ,stopping means into position c he loom. n l't rcpleuiehing loomhaving. in ifanalioin filling supply operating means, ao iiricclor. aweft hammer` loom stopans. controlling means therefor conarranged tomove longitu iv :"ii'atneiji upon the indicationii filling ahsence andto he actuated rotatively h v the weft hammer if there is fillingpresence on a detecting eat following fillingr ahsence to hring the loomstoppage means into position to stop the loom.

fl. A weft rcplenishing loom having, in comhination, filling supplyoperating means. a filling detector, a weft hammer, means for causingloom stoppage, means for controlling the stopping means constructed andarranged to move longitudinally and rotatively upon an indication ofilling absence and thereafter to move rotatively to hring the loomstoppage `-'controlling means into normal position if there is fillingpresence on two detecting heats following filling ahscncc.

lll. A weft replenishing loom havin". in comhination. filling supplyoperating means. a filling detector, a weft hammer. means for causingloom stoppage, a stop-delaying device for controlling thc loom stoppagemeans. a resetting device for actuating the stop-delaying device havinga cam projection provided with a resetting surface and an acceleratingsurface, said resetting device having provision for actuation by theweft hammer.

il. A weft replenishing loom having. in combination, filling supplyoperating means, ay weft hammer. means for causing loom stoppage. andmeans controlling the operation of' the loom stoppage means positivelyconnected with the filling supply operating means and adapted to heactuated therehy when filling is ahsent at the side of the loom oppositethe filling supply operating means, and having provision or actuation hythe weft hammer if filling is present on the side or the loom oppositethe filling supply operating means following filling absence.

l2. A weft replenihing loom having. in combination. filling supplyoperating means, a weft hammer. means for stopping the loomr and meansfor controlling the `iperation of the loom stopping means positivelyconnected with the filling supply operating means and adapted to heactuated thereby when filling is ahsent at the left-hand side of theloom. and having provision for actuation hy the weft hammer to restorethe loom stopping means to normal position i filling present twice insuccession ollowing filling ahsence at the left-hand side of the loom.

1?. A weft rcplcnishing loom having. in combination. filling supplyoperating means, a` weft hammer. means for stopping the looma stopdelaying device having provision for actuation when filling is absent atthe left-hand side of the loom. and a resetting device having provisionfor doubling the movement of the stop delaying-device i filling ispresent immediately after the first i allisence of filling at theleft-hand side of the f combination, filling loom, and having provisionfor resetting the stop delayin device to normal position.

14. A we t replenishing loom having, in combination, filling supplyoperating means, a iilling detector, a weft hammer, means for cansino'loom sto page, a Stop delaying device or contro ling the loom stoppagemeans, and a resetting device, said stop delaying device havingprovision for actuation bv the filling supply operating means on fillingabsence and for actuation b f the resetting device on filling presence,a ollowing filling absence.

l5. A weft replenishing loom having, in supply operating means includinga. rock shaft, an arm rigidly secured thereto, and a lever pivoted onthe arm, a filling deteltm, a weft hammer, means for causing loomstoppage, a stop delaying device pivoted on the lever for conv trollingthe loom stoppage means, and a resetting device adapted to be actuatedby the weft hammer having provision for operative connection With thestop delaying device, Said stop delaying device being constructed andarranged to have a normal movement on filling absence by the fillingsupply operatin means and an accelerated movement on lling presencefollowing filling absence by the resetting device.

JONAS NORTHRQP. Witnesses:

CLARENCE E. A izNoLD, WALLACE E. WATKIN.

